EASY
10th ICSE
IMPORTANT
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Give one example when electrical energy converts into sound energy.

Important Questions on Electrical Power and Household Circuits

EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 9 - Electrical Power and Household Circuits>QUESTIONS>Q 2
Derive formula E=I2Rt where the terms have their usual meanings.
EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 9 - Electrical Power and Household Circuits>QUESTIONS>Q 3
Which bulb has more filament resistance, a 100 W, 220 V or 60 W, 220 V?
EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 9 - Electrical Power and Household Circuits>QUESTIONS>Q 4
An electric bulb of 60 W operates at 220 V. What is the resistance of the filament?
EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 9 - Electrical Power and Household Circuits>QUESTIONS>Q 5
You are given an electric bulb of broken filament. You tactfully reconnect the filament. The bulb now glows brighter. Why?
EASY
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 9 - Electrical Power and Household Circuits>QUESTIONS>Q 6
Some portion of the filament of a room heater is removed. It is connected to the same power supply. Whether the bulb will glow brighter or dimmer? Explain.
MEDIUM
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 9 - Electrical Power and Household Circuits>QUESTIONS>Q 7
Two identical bulbs are marked 60 W, 220 V. What is the resistance of each bulb? The bulbs are now connected in series to a 110 V electric supply. What is the power consumed by each bulb?
MEDIUM
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 9 - Electrical Power and Household Circuits>QUESTIONS>Q 8
Three 500 W heaters are connected in parallel to a 220 V supply.  What is the resistance of each heater? How much is the total current drawn by them? Also find the total energy consumed by heaters in kW h in 6 hours.
MEDIUM
10th ICSE
IMPORTANT
S CHAND'S ICSE PHYSICS BOOK 2>Chapter 9 - Electrical Power and Household Circuits>QUESTIONS>Q 9
An electric motor runs at 2 A current and 220 V potential. What is the resistance of the motor and what is the power dissipated by it? If efficiency of the motor is 70%, how much mechanical power is obtained on the output?